JPH02183659A - Communication equipment - Google Patents

Abstract

PURPOSE:To inform an incoming call without disturbing the talking of the operator by shortening the on-time of a pulse signal of a drive signal driving a ringer circuit when a call comes to other line while one line is busy. CONSTITUTION:A drive signal driving a ringer circuit 31 has a different pulse signal from its on-time depending whether one line of an equipment 21 accommodating 2 lines L1, L2, and L3, L4 has an arrived call or other line receives a call while one line is busy. That is, when a call signal is detected to the line L3, L4 and the line L1, L2 is busy, a CPU 32 uses a drive signal S4 to shorten the on-time of the output of a clock generating circuit 30 then drives a ringer circuit 31 and a call tone is generated by a buzzer BZ to decrease the call tone volume automatically. Thus, the arrival of a call is informed without disturbing the talking of the operator.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a communication device, and more particularly to a communication device that controls the volume of a ringing tone generated from a ringer circuit using a drive signal for driving the ringer circuit.

(Prior Art) Recently, in the information society, facsimile machines have become widespread, and personal computers and the like are increasingly provided with communication functions. In such cases, instead of installing a new telephone line exclusively for the host device such as a facsimile machine or personal computer, use a communication device equipped with a switch to share the line with the existing telephone line. It is common to do so.

Examples of such communication devices include communication devices that selectively connect two lines to a facsimile device and a telephone. In these communication devices, when a ringing signal from each line is detected, the operator is notified of the incoming call by a ringing tone. Various communication devices have been proposed to control this ringing tone.

As a conventional communication device of this kind, there is one equipped with a ringtone adjusting device shown in FIG. In this ringtone adjustment device 1, when a call arrives from line 1, L, a counter 3 is started by an incoming call detection signal from an incoming call detection circuit 2, and a control unit 4 receives a control signal based on a signal from the counter 3 every predetermined time. is output to the sound stitch adjustment section 5. The sound HEM adjustment section 5 drives the speaker 7 so as to increase the volume of the ringtone from the tone ringer 6 in stages based on this control signal. The control signal for the tunnel ringer 6 is shown in FIG.

Further, as a ringer circuit for generating a ringing tone, there is a ringer circuit shown in FIG. 1O. This ringer circuit 11 includes a transistor Tr, a variable resistor RC5, and a fixed resistor R.

and a buzzer BZ, and when there is an incoming call, a variable resistor Rc is adjusted by a control signal from a CPU or the like (not shown) to control the ringing volume generated from the buzzer BZ.

Note that in the above communication device, one line is in communication,
If there is an incoming call on the other line, the operator is notified by the same ringing tone as when there is an incoming call on one line.

In addition, in the case of a black telephone, which generally does not have a ring tone, as shown in Figure 11, the ringing timing is mechanically rung using a 16Hz signal (on for 1 second, off for 2 seconds). There is.

(Problem to be solved by the invention) However, in such conventional communication devices,
If one line receives a call while the other line is communicating,
Because the operator was notified of an incoming call by a ringtone at the same volume level as when there was an incoming call on only one line, a problem occurred in which the ringer was too loud and interfered with the conversation.

(Purpose of the Invention) Therefore, the invention as claimed in claim 1 is provided when there is an incoming call on one line of a communication device accommodating two lines, and when there is an incoming call on the other line while one line is communicating. The drive signal for driving the ringer circuit in each case is a pulse signal having a different on time, and the drive signal is set to 1)) a frequency signal that changes the sound pressure level of the dynamic element. It is an object of the present invention to provide a communication device that can automatically reduce the volume emitted during communication on one line and notify an incoming call without interfering with the operator's conversation.

(Structure of the Invention) In order to achieve the above object, the invention according to claim I provides a ringing signal detecting means that accommodates at least two lines and detects a ringing signal from each line and outputs a detection signal; A ringer circuit for driving an element to generate a ringing tone, and a control means for outputting a drive signal to the ringer circuit in response to a detection signal from a ringing signal detection means, A case where the ringing signal is formed by a frequency pulse signal and a ringing signal is detected only on one of the two lines;
When one line detects a ringing signal on the other line during communication, the on time of the pulse signal is changed, and when one line detects a ringing signal on the other line during communication, the pulse The on-time of the signal is shortened, and the invention according to claim 2 is characterized in that the drive signal is formed by a signal of a predetermined frequency, and the ringing element is a ringer whose sound pressure level changes based on the frequency. A device is provided to change the frequency of the driving signal depending on whether a ringing signal is detected on only one of the two lines or when a ringing signal is detected on the other line while one line is communicating. , the sound pressure level is lowered when one line detects a ringing signal on the other line during communication.

Hereinafter, the present invention will be specifically explained based on examples.

1 to 5 are diagrams showing an embodiment of the invention as claimed in claim 1, which is applied to a facsimile machine accommodating two lines.

In FIG. 1, 21 is a communication device, and the communication device 21
are a ring detection circuit (call signal detection means) 22, 23, a relay 24, 25, a 2W-4W conversion circuit 26, 27, a line changeover switch 28, a handset 29, a clock generation circuit 30, a ringer circuit 31, and a CPU (control means)
32 etc., and a line is connected to the communication device 21.

L2 and times %iLa, t, n are connected.

The call detection circuits 22, 23 are always connected to the lines L+, Lx and the lines Li, L4, respectively.

L2 and concave line L: Detect the calling signal sent from l, L, and ring signals RING 1 and RING 2
is output to the CPU 32.

Relays 24 and 25 each turn on and off to connect the line L I
+L2 and line L3. L4 is closed, and the line changeover switch 28 selectively switches and connects the lines L1, L2, and lines 1-*, La to the handset 29.

These relays 24.25 and line disconnection switches 28
are driven and switched by control signals 81 to S3 from the CPU 32.

2W-4W conversion circuit 26.27 is transformer 33.34,
Receive filter 35.36 and transmit filter 37.38
It outputs the reception signals sent from the lines L2 and Ls and L4 to the handset 29 through the reception filter 35.36, and outputs the transmission signal input from the handset 29 to the transmission filter 37.3.
8 to the line L31L4. Receive filters 35, 36 and transmit filters 37
．． 38 is composed of an operational amplifier and the like.

The handset 29 is composed of a speaker 39 and a microphone 40, and the speaker 39 is connected to the lines L+, Lx and the line Vi.
L3. The microphone 40 outputs the received signal from yAt, + as an audible sound.

It is output as a transmission signal to L2 and lines Li and L4.

The clock generation circuit 30 outputs a clock signal of a predetermined frequency to the ringer circuit 31, and this clock signal is sent to the CPU 3.
The on-time is changed by the drive signal S4 output from 2.

The ringer circuit 31 is composed of a transistor Tr, a resistor R, and a buzzer BZ. The transistor Tr is turned on during the on time of the clock signal output from the clock generation circuit 30, and a current flows through the buzzer BZ to generate a ring tone. Occur. Note that the resistance R is fixed, and the current flowing through the buzzer BZ is constant.

Next, the effect will be explained.

The present invention is characterized in processing a drive signal that drives a ringer circuit when there is an incoming call on one of two lines housed in a communication device, and when there is an incoming call on the other line while one line is communicating. There is. This process will be explained below based on the flowcharts shown in FIGS. 2 and 3.

In the initial state, the communication device 21 has its relay 24.2
5 and the line changeover switch 28 are in the state shown in FIG. 1, that is, the relay 24 and the relay 25 are off, and the line changeover switch 28 is switched to the lines L+ and L2.

First, the normal call operation in line + and Lz will be explained based on the flowchart shown in FIG.

In the above initial state, check whether a ringing signal is detected on the lines Lt, Lx (step PI). When the ringing signal is detected, the ringing detection circuit 22 sends the ring signal 1? r
When NGl is output to the CPU 32, the CPU 32 outputs the drive signal S4 to the clock generation circuit 3o to drive the ringer circuit 31 and generate a ringing tone by the buzzer BZ (step pz). Step P3) checks whether the operator off-hook the hand center 29 due to the ringing tone, and when off-hook, the CPU 32 outputs a control signal S2 to the relay 24 to turn it on, and the relay 24 is turned on.
Close Lz (step p4). After that, switch the line changeover switch 28 to the line L+, Lz side (step P
, ), the call is enabled.

The call operation when there is an incoming call on lines Lt, Lz and lines 1 and 4 will be explained based on the flowchart shown in FIG.

In the above initial state, check whether a ringing signal is detected on the lines L+ and Lx (step P), the ringing signal is detected by the ringing detection circuit 22, and the ringing signal RING is detected.
When l is output to the CPU 32, the CPU 32 outputs a drive signal S4 to the clock generation circuit 30 to drive the ringer circuit 31 and generate a ringing tone by the buzzer BZ (
Step P1□). The ringing tone at this time is the same as the normal case described above, and as shown in FIG. 4(a), the CPU 32 is configured so that the clock generation circuit 30 outputs a 16Hz pulse in order to approximate the ringing pattern of a conventional black telephone. A drive signal S4 is output from. On time L1 of this pulse
The patterns are shown in FIGS. 4(b) and 4(c) (enlarged view of part A), and this pattern is designated as pattern 1. This ring tone causes the operator to check whether or not to take the handset 29 off-hook (step P13), and when off-hook, the relay 24 is turned on by the control signal S2 of the CPU 32 (step P+4), and the line is connected.
After closing L, and switching the line changeover switch 28 to the line Lz side by the control signal S■ (step P+
s), the phone enters a talking state (step P1.). After that, check whether a ringing signal is detected on line L4 (step P+t). When the ringing signal is detected by the ringing detection circuit 23 and the ring signal RING2 is output to the CPU 32, the lines L+ and Lz are Relay 2 whether the call is busy or not
4 is on or not (step P+e). When relay 24 is off, times 41+.

The CPU 32 determines that Lt is not on a call and sends the drive signal S.
4 in pattern l to generate a normal ringing tone by the buzzer BZ (step P19), check whether the line . When it is on, the CPU 32 determines that the line is in a talking state, and the CPU 32 uses the drive signal S4 to change the output of the black/vine generating circuit 30 to the on time of pattern 2 shown in FIG. 4(d). The ringer circuit 31 is driven using the generated pulse signal, and a ringing tone is generated by the buzzer BZ (step P21). Since the ring tone according to pattern 2 at this time has a short pulse signal ON time, the volume is lower than that of the normal ring tone. After the ring tone of pattern 1 is generated (step P19), if the line LI+L2 is not on hold (step P2°), the process returns to checking the off-footer of the handset 29 (step P13) and continues the process. When lines 85L+ and Lz are on hold, or when the operator is notified of an incoming call on lines L3 and L4 by the ring tone of pattern 2, the operator selects the line on which to conduct the conversation (step P2□), and Check whether the selected line is line L+ or Lz (step P2
．． ). When the line Ll, Lt is selected, the line changeover switch 28 is switched to the line Ll, LZ side by the control signal of the CPO 32 (step P24), and the line V
If AL+, t, or z is not selected, it is checked whether the operator has selected to hold the line, , L, or not (step P2.). When it is selected to hold lines Ll+L2, the CPU 32 puts lines L+ and Lx on hold in step P.
zh), line Ll.

If you do not select Lt hold, turn off relay 24 (
Step P2B), the relay 25 is turned on by the control signal S3 of the CPU 32, and the concave 4iL3. Close L4 (Step 7, P28). Thereafter, the line changeover switch 28 is switched to the line L:l, L4 side by the control signal S1 of the CPU 32 (step P2.) to enable a telephone conversation.

As a result, when there is an incoming call independently on line L3., Lt, and when line L3. By outputting the driving signal S4 of the CPU 32 so as to switch the ON time t1 of the pulse signal of the clock generation circuit 30 that drives the buzzer BZ depending on when there is an incoming call on L4, the ringing tone during a call is changed to the normal one. It becomes smaller and allows notification of incoming calls without interfering with the operator's conversation.

Therefore, in the past, the ringing volume was controlled by changing the variable resistor Rc provided in the ringer circuit 11 shown in FIG. 10 to change the volume level of the buzzer BZ, but in this embodiment, The drive time for driving the ringer circuit 31 is controlled to reduce the sound volume for human hearing. That is, the on time t of the clock signal output from the clock generation circuit 30 is shown in FIG. 4(C).
By simply changing it as shown in (d), the absolute integral amount of sound that humans can recognize changes, and the same effect as when actually changing the volume level can be obtained. Note that simply controlling the on-time t1 of each pulse does not easily result in a mechanical ringing tone from a conventional black telephone, so the 11th hour is further differentiated into ta and tb as shown in Figure 4(d), and the 11th hour is divided into ta and tb. Figure 5 shows the on-time (enlarged view of part B in Figure 4 (d))
If you control the ringtone as shown in the figure below, you can get the ring tone close to that of a black telephone. Here, the reason why the ring tone is made closer to that of a conventional black telephone is that black telephones are generally the most contradictory, and electronic sounds using buzzers etc. give a sense of discomfort, so the ring tone is made closer to the ring tone of a black telephone as described above. That's what I do. Furthermore, in this embodiment, the volume of the ringer circuit 31 can be controlled simply by changing the drive signal S4 using the software of the CPU 32 and controlling the clock signal of the clock generation circuit 30. Since the adjustment section and the variable resistor Rc are not required, cost reduction is also possible.

FIG. 6.7 is a diagram showing an embodiment of the communication device according to the invention as claimed in claim 2, which is applied to a facsimile device accommodating two lines.

FIG. 6 is a diagram showing the overall configuration of the communication device, and the same components as those in the embodiment according to the invention as claimed in claim 1 are given the same numbers and the explanation thereof will be omitted.

In FIG. 6, 41 is a ringer circuit;
The circuit 41 includes a grinding resistor R, an h transistor T'r, and a buzzer B.
Consists of Z. The ringer circuit 41 is driven by a clock signal from the clock generation circuit 30, and the clock generation circuit 30 is driven by a drive signal from the CPU 32. The control signal SEL 1 of the CPU 32 is a signal that controls the selection of the clock frequency of the clock generation circuit 30. Incidentally, the buzzer BZ of the ringer circuit 41 has the frequency characteristics shown in FIG.

Next, to explain the effect.

The present invention deals with frequency processing of a drive signal that drives a ringer circuit when there is an incoming call on one of two lines housed in a communication device, and when there is an incoming call on the other while one line is connected. It has that characteristic.

In the initial state, the communication device 21 has its relay 24.2
5 and the line changeover switch 28 are in the state shown in FIG. 6, that is, the relay 24 and the relay 25 are off, and the line changeover switch 28 is switched to the lines L+ and Lz.

In the above initial state, there is an incoming call on the line Lt,
Ring signal RING 1 from the call detection circuit 22 is sent to the CPU
32, the CPU 32 turns off the control signal 5ELl, turns off the drive signal S4, and outputs it to the clock generation circuit 30. The clock generation circuit 30 outputs the clock signal of the resonance frequency f0 shown in FIG. 7 to the ringer circuit. 41.

When the buzzer BZ of the ringer circuit 41 is driven by the drive signal having the resonance frequency fo, a ringing tone having the sound pressure level shown in FIG. 7 is generated. When the operator takes the handset 29 off-hook due to this ringing tone, the CPU 32 turns on the relay 24 with the control signal S2, closes the line L2, and switches the line changeover switch 28 to the line L2 side with the control signal S1. switch and make calls possible.

Kono episode'! aL+, Lz is on the line while talking, L.

There is an incoming call and a ring signal RING is sent from the call detection circuit 23.
2 is output to the CPU 32, the CPU 32 turns on the control signal SEL 1, turns on the drive signal S4, and outputs it to the clock generation circuit 30, and the clock generation circuit 30 generates a clock signal with a frequency f shown in FIG. - output to circuit 41; When the buzzer BZ of the ringer circuit 41 is driven at this frequency f1, a ringing tone having a sound pressure level shown in FIG. 7 is generated.

Therefore, by adopting a buzzer BZ whose sound pressure level changes depending on the frequency of the drive signal, and by switching the frequency, the ringing volume can be adjusted when there is an incoming call on lines L+ and Lt while lines L+ and Lt are talking. It is small enough to notify the operator of an incoming call without interfering with the operator's call.

In addition, the above claim 1it! In each of the embodiments according to the present invention and claim 2, when lines L1 and LZ are busy, line L3. We have explained the case where there is an incoming call on L4, but line L:1. Of course, the same effect can be obtained even if there is an incoming call on the lines L1 and L2 while L4 is talking.

(Effect) According to the invention as claimed in claim 1, there are two cases in which there is an incoming call on one line of a communication device accommodating two lines, and when there is an incoming call on the other line while one line is communicating. The drive signals for driving the ringer circuits are pulse signals having different on-times, and according to the second aspect of the invention, the drive signals are frequency signals that change the sound pressure level of the ringing elements. When there is an incoming call on one line while the other line is communicating, the ringing volume can be automatically reduced, and the incoming call can be notified without interfering with the operator's conversation.

[Brief explanation of the drawing]

1 to 5 are diagrams showing an embodiment of the communication device according to the invention as claimed in claim 1, in which FIG. 1 is an overall configuration diagram thereof, and FIG. 2 is a program for ringing processing during a normal call. Fig. 3 is a flowchart showing a program for ringing processing when one line receives a call while the other line receives a call. Fig. 4 is a waveform diagram of the drive signal that drives the ringer circuit. , FIG. 5 is a diagram showing another aspect of the drive signal of FIG. 4. 6 and 7 are diagrams showing an embodiment of the communication device according to the invention as claimed in claim 2, FIG. 6 is a diagram showing the overall configuration thereof, and FIG. 7 is a diagram showing the frequency characteristics of the buzzer. be. 8 to 11 are diagrams showing a ringing volume adjustment mechanism related to a conventional communication device, FIG. 8 is a block diagram of the ring tone adjustment device, FIG. 9 is a waveform diagram of its drive signal, and FIG. The figure is a ringer circuit diagram, and FIG. 11 is a waveform diagram of a drive signal for the tail of the black telephone. 21...Communication device, 22.23...Call detection circuit (call signal detection means), 31.41...Ringer circuit, 32...
...cpu. BZ...Buzzer L,,L2...Line, L,,L,...Line. Agent Patent Attorney Yugagun Department Figure 1L, L4: Line diagram diagram Diagram diagram Diagram diagram of the frequency characteristics of the computer eC eC

Claims (2)

[Claims] (1) A ringing signal detection means that accommodates at least two lines, detects a ringing signal from each line and outputs a detection signal, a ringer circuit that drives a ringing element to generate a ringing tone, and a ringer circuit that detects a ringing signal. control means for outputting a drive signal to the ringer circuit in response to a detection signal from the means, the drive signal being formed by a pulse signal of a predetermined frequency, and a ringing signal being sent to only one of the two lines; The on-time of the pulse signal is changed depending on the case where one line detects a ringing signal on the other line while one line is communicating, and the ringing signal is detected on the other line while one line is communicating. A communication device characterized in that when the pulse signal is on, the on-time of the pulse signal is shortened. (2) The drive signal is formed by a signal of a predetermined frequency, and a ringing element whose sound pressure level changes based on the frequency is provided as the ringing element, and a ringing signal is detected only on one of the two lines. The frequency of the drive signal is changed depending on the case where one line detects a ringing signal on the other line while communicating, and the frequency of the driving signal is changed depending on the case where one line detects a ringing signal on the other line while communicating. The communication device according to claim 1, characterized in that the sound pressure level is lowered.